scholarly journals Geomorphic Classification and Assessment of Mangrove Degradation in the Henry’s and Patibania Island, South Western Sundarban

2020 ◽  
Vol 3 (9) ◽  
pp. 111-115
Author(s):  
Debasmrity Mukherjee ◽  
Ashis Kumar Paul
Keyword(s):  
Chemical Properties ◽  
Environmental Parameters ◽  
Bottom Current ◽  
Gis Analysis ◽  
Humid Climate ◽  
Remote Sensing Technique ◽  
Physico Chemical ◽  
Tidal Estuaries ◽  
The Relationship ◽  
Mangrove Degradation

The coast of Henry's island, extending from Saptamukhi River in the east to Bakkhali River in the West. In the hot and humid climate of the Sundarban, a negligible input of fresh water through tidal creeks, high evaporation rate at the surface area are the probable reasons behind the evolution of Hypersaline patches of Henry's and Patibunia Island. The dense salt patches develop in the abandoned portion of the surface then sinks and move out of the tidal estuaries as subterranean flow or a bottom current to make the environment more saline. Development of Saltpan is one of the major hindrances for the growth of mangroves and hampers the ecological balance of Sundarban. Present paper attempts to highlight- I) To study and identification of Geomorphological settings of both island. ii) Analysis of Physico-chemical properties of hyper saline soil. iii) Identification of hyper-saline patches and their impact on mangrove degradation. Application of remote sensing technique and GIS analysis help to find out the relationship between mangrove degradation and salinity within the islands area in the last few decades. Development of hyper saline patches and changing environmental parameters are how much responsible for the mangrove degeneration process are major issues of this paper. The Forest Department has attempted to restore the growth of mangrove and improve fragile ecosystem but without understanding the geomorphology and environmental condition, it is not possible to implement proper managemental strategies for wetland restoration process.

scholarly journals On the relationship between the structural and volumetric properties of solvated metal ions inO-donor solvents using new structural data in amide solvents

2018 ◽  
Vol 20 (21) ◽  
pp. 14525-14536 ◽  
Author(s):  
Daniel Lundberg ◽  
Dorota Warmińska ◽  
Anna Fuchs ◽  
Ingmar Persson
Keyword(s):  
Metal Ions ◽  
Chemical Properties ◽  
Structural Data ◽  
Volumetric Properties ◽  
Physico Chemical ◽  
Solvated Metal Ions ◽  
The Relationship

The relationship between the structural and volumetric properties of ions in solvents with different physico-chemical properties has been studied for 19 cations and six anions in six solvents.

ON THE RELATIONSHIP BETWEEN BLOOD COMPATIBILITY AND SURFACE PHYSICO-CHEMICAL PROPERTIES OF NONTHROMBOGENIC POLYMERS

ASAIO Journal ◽  
1997 ◽  
Vol 43 (2) ◽  
pp. 2
Author(s):  
K. Uchida ◽  
C. Nojiri ◽  
M. Waki ◽  
D. Mizumoto ◽  
T. Kido ◽  
...  
Keyword(s):  
Blood Compatibility ◽  
Chemical Properties ◽  
Physico Chemical ◽  
The Relationship

scholarly journals Study of physico-chemical properties of potential beta-adrenolytics

2014 ◽  
Vol 61 (2) ◽  
pp. 49-54
Author(s):  
M. Stankovičová ◽  
Ž. Bezáková ◽  
P. Mokrý ◽  
P. Salát ◽  
M. Kočík ◽  
...  
Keyword(s):  
Partition Coefficients ◽  
Spectral Characteristics ◽  
Chemical Properties ◽  
Side Chain ◽  
Log P ◽  
Structure Activity ◽  
Physico Chemical ◽  
The Relationship ◽  
Layer Chromatography ◽  
Derivatives Of

Abstract The aim of this paper is the study of physico-chemical properties of the chosen compounds, derivatives of 2-hydroxy-3-[2-(4-methoxyphenyl) ethylamino]propyl-4-[(alkoxycarbonyl)amino]benzoates and 2-hydroxy-3-[2-(2-methoxyphenyl)ethylamino]propyl-4-[(alkoxycarbonyl) amino]benzoates with potential ultra-short beta-adrenolytic activity. The studied compounds are different in the position of the substituent on the benzene ring in the side chain as well as in the aromatic ring in position 4 with alkyl- (methylto butyl-) carbamate. The physico-chemical characteristics, for example, lipophilicity, surface activity, adsorbability, acidobasic properties etc., are very important for the explanation of the relationship between structure and biological activity of the drug. These parameters serve as the base of quantitative structure-activity study. The goal of this work is to establish the spectral characteristics of studied compounds in UV-area, pKa values, the parameters of lipophilicity (the values of Rf and RM from thin layer chromatography, retention time t´R and capacity factor k´ from liquid chromatography and experimental partition coefficients log P´ values), surface tension, critical micelle concentrations, the adsorbability of compounds expressed by percent of adsorbed compound on active charcoal β% as well as by Freundlich adsorption isotherms. The obtained values are correlated with the parameters characterising the size of molecule, for example, the number of carbon atoms on carbamate functional group.

scholarly journals The Relationship between the Physico-chemical Properties of Longissimus-Rib and of Major Muscles

2006 ◽  
Vol 77 (1) ◽  
pp. 37-43
Author(s):  
Naoto NAKANISHI ◽  
Shinichi KAWAKAMI ◽  
Tomoya YAMADA ◽  
Yasuhiro AOKI
Keyword(s):  
Chemical Properties ◽  
Physico Chemical ◽  
The Relationship

scholarly journals Hybrid Methacrylated Gelatin and Hyaluronic Acid Hydrogel Scaffolds. Preparation and Systematic Characterization for Prospective Tissue Engineering Applications

2021 ◽  
Vol 22 (13) ◽  
pp. 6758
Author(s):  
B. Velasco-Rodriguez ◽  
T. Diaz-Vidal ◽  
L. C. Rosales-Rivera ◽  
C. A. García-González ◽  
C. Alvarez-Lorenzo ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Hyaluronic Acid ◽  
Engineering Application ◽  
Chemical Properties ◽  
Tissue Engineering Application ◽  
Hydrogel Scaffolds ◽  
Hybrid Hydrogels ◽  
Physico Chemical ◽  
Scaffold Structure ◽  
The Relationship

Hyaluronic acid (HA) and gelatin (Gel) are major components of the extracellular matrix of different tissues, and thus are largely appealing for the construction of hybrid hydrogels to combine the favorable characteristics of each biopolymer, such as the gel adhesiveness of Gel and the better mechanical strength of HA, respectively. However, despite previous studies conducted so far, the relationship between composition and scaffold structure and physico-chemical properties has not been completely and systematically established. In this work, pure and hybrid hydrogels of methacroyl-modified HA (HAMA) and Gel (GelMA) were prepared by UV photopolymerization and an extensive characterization was done to elucidate such correlations. Methacrylation degrees of ca. 40% and 11% for GelMA and HAMA, respectively, were obtained, which allows to improve the hydrogels’ mechanical properties. Hybrid GelMA/HAMA hydrogels were stiffer, with elastic modulus up to ca. 30 kPa, and porous (up to 91%) compared with pure GelMA ones at similar GelMA concentrations thanks to the interaction between HAMA and GelMA chains in the polymeric matrix. The progressive presence of HAMA gave rise to scaffolds with more disorganized, stiffer, and less porous structures owing to the net increase of mass in the hydrogel compositions. HAMA also made hybrid hydrogels more swellable and resistant to collagenase biodegradation. Hence, the suitable choice of polymeric composition allows to regulate the hydrogels´ physical properties to look for the most optimal characteristics required for the intended tissue engineering application.

scholarly journals Microbiological and physicochemical quality of honey in Bosnia and Herzegovina

2022 ◽  
Vol 53 (5) ◽  
Author(s):  
Viktor Landeka ◽  
Željka Cvrtila ◽  
Lidija Kozačinski ◽  
Maja Drmać ◽  
Ana Sesar ◽  
...  
Keyword(s):  
Bosnia And Herzegovina ◽  
Microbiological Quality ◽  
Chemical Properties ◽  
Quality Parameters ◽  
Physico Chemical ◽  
Microbiological Parameters ◽  
Administrative Units ◽  
Assess Quality ◽  
The Relationship

The aim of the study was to investigate the microbiological and physico-chemical quality of honey samples, sampled for the event “Honey Days in FB&H 2020”, which tested a total of 33 samples of different honey types from different geographical areas of Bosnia and Herzegovina (B&H). The aim of this study was to evaluate the relationship between physico-chemical properties and microbiological properties of the tested honey to assess quality. The submitted samples originated from both administrative units of B&H, namely from the continental, sub-Mediterranean and Mediterranean part, covering more than 60% of the country’s territory. Of the total number of analysed samples (n=33), nine samples (29.7%) did not meet the requirements of physico-chemical and microbiological parameters of the test. The requirements of one or more quality parameters according to the national Ordinance on methods for the control of honey and other bee products in B&H (Anonymous, 2009) were not met by five samples (16.5%). Four samples (13.2%) did not meet the microbiological quality, as they exceeded the permitted number of yeasts and moulds. In five samples (16.5%), the presence of microorganisms was recorded within the tolerance limits, while Enterobacteriaceae and sulphite-reducing clostridia were not isolated and were below the detection limit in all samples. Honey samples in which the results were found to be unsatisfactory for physico-chemical parameters and microbiological parameters cannot be correlated.

scholarly journals Assessment of the relationship between some physico-chemical properties of soil and soil algae in micro basin scale in Kocaeli

2020 ◽  
Vol 14 (2) ◽  
pp. 169-176
Author(s):  
Arzu Morkoyunlu Yüce ◽  
Hüseyin Altundağ
Keyword(s):  
Organic Matter ◽  
Chemical Properties ◽  
Soil Nutrient ◽  
Nutrient Content ◽  
Soil Parameters ◽  
Algal Flora ◽  
Soil Algae ◽  
Physico Chemical ◽  
Basin Scale ◽  
The Relationship

In this study, it was aimed to determine the relationship between soil algae and physico-chemical structure of soil. Algae composition and some soil quality parameters from 12 sampling stations were investigated between March 2019 and May 2019 in Kocaeli. Physico-chemical properties that reflect soil nutrient content and fertility status (pH, conductivity, salinity, CaCO3, organic matter, saturation, P2O5 and K2O) were determined using standard physicochemical techniques. Average in soil parameters were determined as pH: 8.06, conductivity: 5.79 µmhos / cm, salinity: 0.22 ‰, CaCO3: 9.98%, organic matter: 1.70%, saturation: 59.55%, P2O5: 3.16 kg / da, K2O: 93.92 kg / da. Algal flora of Kocaeli province was a total of 30 taxa, 14 taxa of Bacillariophyta, 3 taxa of Chlorophyta, 1 taxa of Charophyta and 12 taxa of Cyanobacteria were identified. The determined as the Chroococcus cohaerens, Limnococcus limneticus, Phormidium nigroviride, Oscillatoria limosa, Gomphonema olivaceum, Hantzschia amphioxys and Nitzschia brevissima most dominant taxa. These taxa have been identified in stations with high industrial activity. Bacillariophyta taxa were found in all months due to their ecological tolerance, while other species belong to spring. In this study, the species diversity were found similar in research stations.

scholarly journals Viscosity Approximation of PDMS Using Weibull Function

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6060
Author(s):  
Andrzej Chmielowiec ◽  
Weronika Woś ◽  
Justyna Gumieniak
Keyword(s):  
Dynamic Viscosity ◽  
Chemical Properties ◽  
High Viscosity ◽  
Point Of View ◽  
Accurate Estimation ◽  
Weibull Function ◽  
Damping Factor ◽  
Dissipation Process ◽  
Physico Chemical ◽  
The Relationship

The viscosity of a fluid is one of its basic physico-chemical properties. The modelling of this property as a function of temperature has been the subject of intensive studies. The knowledge of how viscosity and temperature variation are related is particularly important for applications that use the intrinsic friction of fluids to dissipate energy, for example viscous torsional vibration dampers using high viscosity poly(dimethylsiloxane) as a damping factor. This article presents a new method for approximating the dynamic viscosity of poly(dimethylsiloxane). It is based on the three-parameter Weibull function that far better reflects the relationship between viscosity and temperature compared with the models used so far. Accurate mapping of dynamic viscosity is vitally important from the point of view of the construction of viscous dampers, as it allows for accurate estimation of their efficiency in the energy dissipation process.

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